This EHT rectifier has no identification visible. The anode connects to the top cap and the two side pins connect to the single loop filament. The filament seems to be open circuit.
The base cap is a simple cover. The connections to the filament are via the side pins. A bayonet base seems appropriate.
The pinch with the single loop filament that passes into the lower metal screen.
The anode consists of a disc and round ended pin. The lower cylinder does not appear to have any electric connection - so possibly an X-ray screen.
Side view of the anode and screen.
The microscope clearly shows the missing section of filament.
A second example with an intact filament.
The wide glass tube envelope is 38 mm in diameter and, excluding the base pins, is 142 mm tall.
Updated June 17, 2021.